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  Carbon nanotube film, production process thereof and capacitor using the sameThe Patent Description & Claims data below is from USPTO Patent Application 20080049380. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCE TO RELATED APPLICATIONS [0001]This application is based on and claims priority under 35 USC 119 from Japanese Patent Application No. 2006-222550 filed on Aug. 17, 2006. BACKGROUND [0002]1. Technical Field [0003]The present invention relates to a carbon nanotube film and a production process thereof. [0004]The invention also relates to a capacitor which is an electrical element utilizing such a carbon nanotube film. [0005]2. Related Art [0006]Carbon nanotubes have been expected to find wide application as next-generation materials that exhibit a variety of characteristics derived from its specific shape and structure. [0007]Carbon nanotubes are in the form of a one-dimensional tube developed by winding a graphene sheet composed of 6-membered carbon ring. Carbon nanotubes having one graphene sheet are called single-walled carbon nanotube (SWCNT) and carbon nanotubes having multiple graphene sheets are called multi-walled carbon nanotube (MWCNT). [0008]SWCNT is said to have a diameter of about 1 nm. MWCNT is normally said to have a diameter of about tens of nanometers. They are extremely finer than materials which have been heretofore called carbon fiber (diameter: from tens of nanometers to 1,000 nm). [0009]Carbon nanotubes are also characterized in that they have a length on the order of micrometer (.mu.m) and a very large aspect ratio of length to diameter. [0010]Further, carbon nanotubes have 6-membered carbon rings aligned helically and thus are a material having so extremely rare characteristics that both metallic properties and semiconductivity are exhibited. In addition, carbon nanotubes have an extremely high electrical conductivity and thus allow the passage of current at a density of 100 MA/cm.sup.2 or more. [0011]Carbon nanotubes are excellent in mechanical characteristics as well as electrical properties. In some detail, since carbon nanotubes are composed of only carbon atoms, they exhibit a Young modulus of more than 1 TPa and thus are extremely rigid despite its very low weight. [0012]Thus, carbon nanotubes have various excellent properties and thus are a material which is extremely attractive as industrial material. Carbon nanotubes have found application in the art of electronic devices (electronic elements) such as flat panel display and transistor. [0013]As actual methods for processing and film-forming carbon nanotubes according to device design there are known film-forming/patterning methods involving chemical vapor deposition method (CVD method), electrophoresis method, screen printing method with a mixture with a binder, or the like. SUMMARY [0014]According to an aspect of the invention, there is provided a carbon nanotube film including a first carbon nanotube group that is an aggregate of carbon nanotubes crosslinked to each other to form a network structure and a second carbon nanotube group that is an aggregate of carbon nanotubes having a diameter different from a diameter of the carbon nanotubes in the first carbon nanotube group, wherein the first carbon nanotube group and the second carbon nanotube group are in admixture. BRIEF DESCRIPTION OF THE DRAWINGS [0015]Exemplary embodiment(s) of the present invention will be described in detail based on the following figures, wherein: [0016]FIG. 1 is a sectional view illustrating a capacitor according to an embodiment which is an exemplary embodiment of the capacitor of the invention, wherein 2 denotes Separator, 4a and 4b denote Polarizable electrodes, 6a and 6b denote Collecting electrodes and 10 denotes Capacitor; [0017]FIG. 2 depicts the reaction scheme of synthesis of carbon nanotube carboxyl acid in Clause (Introduction of functional groups into small diameter carbon nanotube) in Example 1; [0018]FIG. 3 depicts the reaction scheme of esterification in Clause (Introduction of functional groups into small diameter carbon nanotube) in Example 1; [0019]FIG. 4 depicts the reaction scheme of crosslinking involving ester exchange reaction in Clause (Introduction of functional groups into small diameter carbon nanotube) in Example 1; [0020]FIG. 5 is a view showing a scanning electron microphotograph (150.times. magnification) of a section of the carbon nanotube film obtained in Example 1; Continue reading... Full patent description for Carbon nanotube film, production process thereof and capacitor using the same Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Carbon nanotube film, production process thereof and capacitor using the same patent application. Patent Applications in related categories: 20080291604 - Electrolytic capacitor - An electrolytic capacitor (A1) of the present invention includes an anode (2), a cathode (3) and an electrolyte (4) intervening between the anode (2) and the cathode (3). The anode (2) includes a porous sintered body (21) made of valve metal and having a surface on which an oxide film ... ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Carbon nanotube film, production process thereof and capacitor using the same or other areas of interest. ### Previous Patent Application: Scalable lead zirconium titanate (pzt) thin film material and deposition method, and ferroelectric memory device structures comprising such thin film material Next Patent Application: Solid electrolytic capacitor and method for producing the same Industry Class: Electricity: electrical systems and devices ### FreshPatents.com Support Thank you for viewing the Carbon nanotube film, production process thereof and capacitor using the same patent info. IP-related news and info Results in 0.14122 seconds Other interesting Feshpatents.com categories: Medical: Surgery , Surgery(2) , Surgery(3) , Drug , Drug(2) , Prosthesis , Dentistry |
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